PROFESSIONAL

INSTRUCTION MANUAL

ModelNo.

PRECISION MEASURING INSTRUMENTS

WTI-8038RL/WTI-8038WL

DIAL INDICATOR (LONG PROBE)
Thank you for purchasing the Niigata Seiki Dial Indicator.
Used with a Magnetic Base or Indicator Stand, this gauge will show the change in height orposition of a surface relative to a zero point set at a reference surface.
wheree standard indicator can notnot■ APPLICATIONS • Deep grooves and tight locations wherbe used.
• Use on milling machines and laths for centering, measure runout,parallelism, flatness, etc.
• Mount on height gauge for various measurements.
measurements.

●For safe and correct use of this product, please read this instruction manual before use and follow
the procedures described. Please keep manual where it is accessible to user for future reference.
●Keep this manual with the instrument if transferred or leased to a third party.
●For inquiries about this product, please contact dealer or Niigata Seiki at the address listed on thefollowing page.

■PART IDENTIFICATION & FUNCTION※ Model WTI-8038RL shown⑤ Dovetails

WTI-8038RL① Pointer(Needle)② ScalePlate④ Bezel[Accessories]⑦ Mount③ Probe(Stylus)① Pointer ……… Shows measurement on theScale Plate.
② Scale plate … Graduated to show reading.
Turn Bezel to rotate.
③ Probe ……… Feeler which contacts workpiece.
④ Bezel ……… Rotate to turn Scale Plate.

⑥ Stem（φ6･φ8mm）⑧ Dovetailgroove⑨ Probe Spanner… For attaching Stem.
⑤ Dovetails ……
⑥Stem …………… For mounting to Holder.
⑦ Stem Mount … Connects Stem to gauge.
… Matches Dovetail in gauge⑧ Groove ………
body for mounting Stem.
⑨ Spanner ……… Tool to change Probe.

SAFETY PRECAUTIONS

Please Observe

Always follow the procedures specified below in order to prevent harm to yourself or others, and toprevent damage to property.
■Content marked as follows indicates risk of injury or damage if not followed.

W A R N I N G Indicates risk of personal injury or property damage if not followed.

■These symbols mark content that must be observed.
Denotes a prohibition – You MUST NOT do.

Denotes a requirement – You MUST do.

CAUTION
Read the manual and follow all instructions.

Do not disassemble or modify.

• Use of product other than as described in● It may damage Gauge and cause poor accuracy.
● If screws are removed, internal components
may come loose and become misaligned
causing product failure.

the manual may cause accident.

Use only as indicator Gauge.

•Use for any purpose other than measuring may
damage or wear the instrument. Improper use
may also cause accident.

Do not shock Probe.
•Rapid motion, or lateral force may damage
Gauge and cause poor accuracy.

Use in an environment which meets thefollowing conditions:●Temperature within range of 0~40°C、humidity
30~70% (non-condensing.)●Location with minimal dust, oil, oil mist, andprotected from direct sunlight.
●Location protected from use by children

WTI-8038RL

and unauthorized people.
• Use in location contrary to the above may●
cause poor accuracy, damage to theproduct, or may result in accident or injury.

Do not shock Probe.
● Do not drop or subject to shock, do notplace under heavy objects. Damage may
cause failure or poor accuracy.

Measurement
Direction

PREPARATION - Mounting
Dial Indicator must be securely mounted such as on a comparator stand or magnetic base.
Please follow these guidelines.
Gauge

Make sure Gauge holder is rigid.
• Holder must be sufficiently secure to prevent
deflection from the weight of the Gauge.
• Holder must be rigid enough to hold Gauge andnot to lift from measurement force.
• Holder support arm should be as short as possible
to prevent deflection.

⑥ StemHolderSupport
Arm

Minimize※Deflection or lifting will cause measurement error,
such as origin position error and inaccuracies inmeasured reading.

Gauge must only be attached by Dovetail or Stem
• Mounting of gauge by other than Stem or Dovetailwill cause inaccuracy and product damage.

※MountingExample

HOW TO USE - Preparation① Attach Mounting Stem.

⑤ Dovetail

Loosen the Stem mounting bracket and slide the groove
onto the Dovetail in the desired position. Tighten theStem to secure. (Choose a stem with diameter to match
the Gauge Holder you plan to use.)⑤ Dovetail

Insert② Confirm that the Probe and stem are secure⑧ Groove

Tightenwithout any play.

⑥ Stem Mount

If they are loose, tighten to secure.

③ Attach the Indicator Gauge to the Holder.
Please attach by the Stem only.

④ Confirm that the pointer moves freely.

Bring the Probe into contact with the workpiece,
and gently raise and lower the gauge while
checking the movement. Confirm that the pointerreturns to initial position when raised.

⑤ Make sure the Probe is parallel to the measured
surface, and perpendicular to the direction ofthe measurement.

Insert⑥ StemSlightly Loose

Insert（φ6･φ8mm）※ Rotate to remove

Dir. of Measurement

Dir. of Measurement

90°

90°

Dir. of Measurement

Dir. of Measurement

If probe is not positioned properly, the measurement
will be inaccurate and operation may be faulty.

HOW TO USE - Comparison Measurements
For Best accuracy, use a reference master the sameheight as the workpiece.

〔Ex.〕Ref. Part 30mm Gauge Block：30.00mm
Workpiece height：30.08mm

Position the reference Part with the measured surface
parallel to the probe and perpendicular to the direction ofthe measurement. Bring into contact with the probe, but
use care that the part does not bump the probe from theside.

〈Set Origin with Reference Part〉 〈Measure〉① Set Up Reference Part

① Pointer② Set the Origin.

WT

Adjust the gauge mount or rotate the Bezel to set
the Gauge to “0”.

③ Remove the Reference Part and Measure theWorkpiece

Remove the master with care not to jostle the gauge.
Replace with the workpiece and read the scale.

I-8

03

8RL

② Scale
Plate

WT

I-8

03

8R

L

④ Bezel

How to Use - (Parallelism, Flatness, Runout, etc.)① Position the probe on the workpiece.

Position the Part with the measured surface parallel to the probe and perpendicular to the direction of themeasurement. Bring into contact with the probe, but use care that the part does not bump the probe from the side.

② Set the Origin.

Adjust the gauge mount or rotate the Bezel to set the Gauge to “0”.

③ Move the workpiece and read the scale.

Move the work slowly while reading the position of the pointer on the scale.

TROUBLESHOOTINGSPECIFICATIONS■ If origin position shifts during measurement.

Model
WTI-8038RL WTI-8038WL
CarbideRuby
Contact Material
Graduations
0.01 mm
Meas. Range
0 〜 0.8 mm
Scale
0 - 40 - 0
Wide-Range Acc'y
13 μm
Retrace Error
9 μm
Measuring Force< 0.2 N
Repeatability
3 μm
Adjacent Error
10 μm
Weight80 ｇReplacement
WTI-80RL
WTI-80WL
Probe Part No.

● Temperature changes during measurement cancause repeatability error. Please try the following
solutions:●Use in location with stable temperature.
●When taking measurements, periodically adjust zero
point using a Master reference to correct for
temperature induced drift.

• Make sure the Stem is not loose, and tighten ifnecessary.

■ Measurement is not stable, or measurement
accuracy is poor.

Probe may be worn; a worn Probe will affect accuracy.
Periodically check for wear, and replace if wear isaffecting measurement accuracy.

AFTER USE CARE, STORAGE
Remove any dust or dirt after use.
※ Do not lubricate.

• Wipe any contamination from Probe and moving surfaces
using a dry cloth, or cloth moistened with alcohol.
• To clean other surfaces, wipe with a soft dry cloth, or acloth moistened with a mild cleaner.

R e p l a c i n g Pr o b e
Please use Spanner suppliedwith gauge.

SpannerTightenSlot

Check for wear of Probe tip.
• Measurement accuracy will be affected by worn Probe.
Regularly check for wear and replace Probe if worn.

LoosenStore in provided case in a cool, dark, and dry location.
• During storage, make sure there is no force on the Probe(such as pushed in, or lateral force.)• Keep away from moisture and direct sunlight, and securefrom unauthorized personnel.

Use only factory approved Probe. Using alternate
probe may cause error.
• Always perform calibration after replacing Probe.

CALIBRATION
To maintain measurement accuracy, periodic calibration is recommended.
(For reference, we recommend a calibration interval of 3~4 months
when used in a factory.)Adjusting Probe After Changing
Rotate Probe to expose screw asshown. Using a screwdriver, turnscrew and adjust Probe length.

Screw

Outside Japan,
Please contact distributor or place of purchase to inquire about
calibrations services.

Niigata Seiki Co., Ltd.
5-3-14, Tsukanome, Sanjo, Niigata, Japan, 955-0055+81-256-33-5522 FAX : +81-256-33-5518

MAIL: intl.sales@niigataseiki.co.jp
URL: http://www.niigataseiki.co.jp

E399-K 1910